Background Randomised placebo-controlled trials have shown that daily oral pre-exposure
prophylaxis (PrEP) with tenofovir–emtricitabine reduces the risk of HIV infection. However, …

Digital technologies are being harnessed to support the public-health response to COVID-19
worldwide, including population surveillance, case identification, contact tracing and …

Background Sexual behaviour is a major determinant of sexual and reproductive health. We
did a National Survey of Sexual Attitudes and Lifestyles (Natsal 2000) in 1999–2001 to …

Background More than 10 years have elapsed since human papillomavirus (HPV) vaccination
was implemented. We did a systematic review and meta-analysis of the population-level …

Background Relatively high rates of teenage conception and sexually transmitted infection
among young people in Britain have focused attention on early sexual behaviour and its …

Background Human papillomavirus (HPV) vaccination programmes were first implemented
in several countries worldwide in 2007. We did a systematic review and meta-analysis to …

Background Sexual behaviour and relationships are key components of wellbeing and are
affected by social norms, attitudes, and health. We present data on sexual behaviours and …

The study of sexual behaviour lies at the heart of understanding the transmission dynamics
of sexually transmitted infections (STIs). Academic investigation into sexual behaviour dates …

Context Mortality among human immunodeficiency virus (HIV)–infected individuals has
decreased dramatically in countries with good access to treatment and may now be close to …

Objective: To characterize the mode of hepatitis C virus (HCV) transmission in a recent
epidemic of acute HCV in HIV-infected individuals using linked molecular and clinical …